grain.social/grain

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{
  "id": "app.bsky.richtext.facet",
  "defs": {
    "tag": {
      "type": "object",
      "required": ["tag"],
      "properties": {
        "tag": {
          "type": "string",
          "maxLength": 640,
          "maxGraphemes": 64
        }
      },
      "description": "Facet feature for a hashtag. The text usually includes a '#' prefix, but the facet reference should not (except in the case of 'double hash tags')."
    },
    "link": {
      "type": "object",
      "required": ["uri"],
      "properties": {
        "uri": {
          "type": "string",
          "format": "uri"
        }
      },
      "description": "Facet feature for a URL. The text URL may have been simplified or truncated, but the facet reference should be a complete URL."
    },
    "main": {
      "type": "object",
      "required": ["index", "features"],
      "properties": {
        "index": {
          "ref": "#byteSlice",
          "type": "ref"
        },
        "features": {
          "type": "array",
          "items": {
            "refs": ["#mention", "#link", "#tag"],
            "type": "union"
          }
        }
      },
      "description": "Annotation of a sub-string within rich text."
    },
    "mention": {
      "type": "object",
      "required": ["did"],
      "properties": {
        "did": {
          "type": "string",
          "format": "did"
        }
      },
      "description": "Facet feature for mention of another account. The text is usually a handle, including a '@' prefix, but the facet reference is a DID."
    },
    "byteSlice": {
      "type": "object",
      "required": ["byteStart", "byteEnd"],
      "properties": {
        "byteEnd": {
          "type": "integer",
          "minimum": 0
        },
        "byteStart": {
          "type": "integer",
          "minimum": 0
        }
      },
      "description": "Specifies the sub-string range a facet feature applies to. Start index is inclusive, end index is exclusive. Indices are zero-indexed, counting bytes of the UTF-8 encoded text. NOTE: some languages, like Javascript, use UTF-16 or Unicode codepoints for string slice indexing; in these languages, convert to byte arrays before working with facets."
    }
  },
  "$type": "com.atproto.lexicon.schema",
  "lexicon": 1
}